From: kernel test robot <lkp@intel.com>
To: Jonathan Flynn <jonathan.flynn@hammerspace.com>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Mike Snitzer <snitzer@kernel.org>
Subject: [snitzer:kernel-7.3/canary 285/387] fs/nfs/flexfilelayout/flexfilelayout.c:760:9: error: instruction requires the following: RV64I Base Instruction Set
Date: Sat, 24 Oct 2026 12:10:01 +0200 [thread overview]
Message-ID: <202610241225.b9yb7x6H-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/snitzer/linux.git kernel-7.3/canary
head: 2bbaed9eb0e6249faa555ea839da7a7a88820f6d
commit: 31c1686e8f4441749d31204c83efc843f02d6af6 [285/387] NFSv4/flexfiles: move layoutstats accounting to a per-stripe lock
config: riscv-randconfig-2000-20261024 (https://download.01.org/0day-ci/archive/20261024/202610241225.b9yb7x6H-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project a808f8ea7fdc61ead417bfe55e8ef5f728776aeb)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261024/202610241225.b9yb7x6H-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610241225.b9yb7x6H-lkp@intel.com/
All errors (new ones prefixed by >>):
>> fs/nfs/flexfilelayout/flexfilelayout.c:760:9: error: instruction requires the following: RV64I Base Instruction Set
760 | return try_cmpxchg64(&ffl->last_report_time, &last_report, now);
| ^
include/linux/atomic/atomic-instrumented.h:4918:2: note: expanded from macro 'try_cmpxchg64'
4918 | raw_try_cmpxchg64(__ai_ptr, __ai_oldp, __VA_ARGS__); \
| ^
include/linux/atomic/atomic-arch-fallback.h:259:9: note: expanded from macro 'raw_try_cmpxchg64'
259 | ___r = raw_cmpxchg64((_ptr), ___o, (_new)); \
| ^
include/linux/atomic/atomic-arch-fallback.h:98:23: note: expanded from macro 'raw_cmpxchg64'
98 | #define raw_cmpxchg64 arch_cmpxchg64
| ^
arch/riscv/include/asm/cmpxchg.h:303:2: note: expanded from macro 'arch_cmpxchg64'
303 | arch_cmpxchg((ptr), (o), (n)); \
| ^
arch/riscv/include/asm/cmpxchg.h:294:20: note: expanded from macro 'arch_cmpxchg'
294 | SC_PREPEND(""), SC_APPEND(RISCV_FULL_BARRIER), \
| ^
<inline asm>:1:5: note: instantiated into assembly here
1 | 0: lr.d s0, 0(a0)
| ^
>> fs/nfs/flexfilelayout/flexfilelayout.c:760:9: error: instruction requires the following: RV64I Base Instruction Set
760 | return try_cmpxchg64(&ffl->last_report_time, &last_report, now);
| ^
include/linux/atomic/atomic-instrumented.h:4918:2: note: expanded from macro 'try_cmpxchg64'
4918 | raw_try_cmpxchg64(__ai_ptr, __ai_oldp, __VA_ARGS__); \
| ^
include/linux/atomic/atomic-arch-fallback.h:259:9: note: expanded from macro 'raw_try_cmpxchg64'
259 | ___r = raw_cmpxchg64((_ptr), ___o, (_new)); \
| ^
include/linux/atomic/atomic-arch-fallback.h:98:23: note: expanded from macro 'raw_cmpxchg64'
98 | #define raw_cmpxchg64 arch_cmpxchg64
| ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/riscv/include/asm/cmpxchg.h:292:2: note: expanded from macro 'arch_cmpxchg'
292 | _arch_cmpxchg((ptr), (o), (n), \
| ^
arch/riscv/include/asm/cmpxchg.h:251:3: note: expanded from macro '_arch_cmpxchg'
251 | __arch_cmpxchg(".d", ".d" sc_sfx, ".d" cas_sfx, \
| ^
arch/riscv/include/asm/cmpxchg.h:212:5: note: expanded from macro '__arch_cmpxchg'
212 | " sc" sc_sfx " %1, %z4, %2\n" \
| ^
<inline asm>:3:2: note: instantiated into assembly here
3 | sc.d.rl a1, s3, 0(a0)
| ^
>> fs/nfs/flexfilelayout/flexfilelayout.c:760:9: error: register must be even
760 | return try_cmpxchg64(&ffl->last_report_time, &last_report, now);
| ^
include/linux/atomic/atomic-instrumented.h:4918:2: note: expanded from macro 'try_cmpxchg64'
4918 | raw_try_cmpxchg64(__ai_ptr, __ai_oldp, __VA_ARGS__); \
| ^
include/linux/atomic/atomic-arch-fallback.h:259:9: note: expanded from macro 'raw_try_cmpxchg64'
259 | ___r = raw_cmpxchg64((_ptr), ___o, (_new)); \
| ^
include/linux/atomic/atomic-arch-fallback.h:98:23: note: expanded from macro 'raw_cmpxchg64'
98 | #define raw_cmpxchg64 arch_cmpxchg64
| ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/riscv/include/asm/cmpxchg.h:292:2: note: expanded from macro 'arch_cmpxchg'
292 | _arch_cmpxchg((ptr), (o), (n), \
| ^
arch/riscv/include/asm/cmpxchg.h:251:3: note: expanded from macro '_arch_cmpxchg'
251 | __arch_cmpxchg(".d", ".d" sc_sfx, ".d" cas_sfx, \
| ^
arch/riscv/include/asm/cmpxchg.h:199:5: note: expanded from macro '__arch_cmpxchg'
199 | " amocas" cas_sfx " %0, %z2, %1\n" \
| ^
<inline asm>:3:20: note: instantiated into assembly here
3 | amocas.d.aqrl s0, s3, 0(a0)
| ^
3 errors generated.
vim +760 fs/nfs/flexfilelayout/flexfilelayout.c
732
733 static bool
734 nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,
735 u32 dss_id,
736 struct nfs4_ff_layoutstat *layoutstat,
737 ktime_t now)
738 {
739 s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL;
740 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout);
741 ktime_t last_report;
742
743 nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now);
744 if (!mirror->dss[dss_id].start_time)
745 mirror->dss[dss_id].start_time = now;
746 if (mirror->report_interval != 0)
747 report_interval = (s64)mirror->report_interval * 1000LL;
748 else if (layoutstats_timer != 0)
749 report_interval = (s64)layoutstats_timer * 1000LL;
750
751 /*
752 * last_report_time is shared by every mirror and stripe of this
753 * layout, so it was never serialised by the mirror lock either.
754 * Make that explicit: whoever wins the cmpxchg() reports.
755 */
756 last_report = READ_ONCE(ffl->last_report_time);
757 if (ktime_to_ms(ktime_sub(now, last_report)) < report_interval)
758 return false;
759
> 760 return try_cmpxchg64(&ffl->last_report_time, &last_report, now);
761 }
762
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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